Now for The OP --
Taxing religion :
Religion is a Constitutionally guaranteed right, correct ?
Wouldn't taxing a religion be the same as a 'Poll Tax' ? - All of you have been harping on 'poll tax' every time the notion of voter ID comes up, even if its freely provided by the state, so I would certainly think that removing funds from a religion negatively impacts its ability to be freely practiced, right ?